Gearing for bicycles.



No. 669,879. v Patented Mar. l2, [90L C. GANZ.

GEARING FOR BICYCLES.

(Application filed Apr. 11, 1900'.)

(No Model.)

wa f/zessesr Rye/Zia)", %wj//W. azm'sa'ow amz ms PETERS c0. Puma-uwm WASHINGYON, D- c UNITED STATES PATENT OFFICE.

CHRISTIAN GANZ, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF ONE-HALF TO WILLIAM A. STEIGER, OF NE\V YORK, N. Y.

GEARING FOR BICYCLES.

SPECIFICATION formingpart of Letters Patent No. 669,879, dated March 12, 1901.

Application filed April 11, 1900. Serial No. 12,476. (No model.)

To ctZZ whom it may concern: bodied. Fig. 2 isa sectional plan view of the Be it known that I, CHRISTIAN GANZ, a citimachine. zen of the United States, residing at Wash- Like reference-numerals indicate like parts ington, in the District "of Columbia, have inin both views. vented newand usefullmprovementsin Gear- The frame 1 of the bicycle may be of the ing for Bicycles, of which the following is a usual diamond shape,with the seat-post tube specification. 2 formed withafork or yoke3 at its lower end.

In United States Patent granted to me May Extending through the branches of the fork 3, 1, 1900, No. 648,865, I have shown and deat the intersection of the seat-post tube 2 1o scribed certain improvements in chainless with the lower reach 4 and the lower runs 5, 6o bicycles, which consist of agearing for transis the crank-shaft 6, provided with cranks mitting power from the pedal-shaft to the and pedals upon its outer ends. Secured to driving-wheel comprising two gears secured the crank-shaft 6 and located between the to the crank or pedal shaft, two pinions meshbranches of the fork 3 is a spur-gear 7, which [5 ing with said gears having wrist-pins theremeshes with a pinion 8, located above said on, pinions on the axle of the driving-wheel, gear within the fork 3 and mounted upon a gears meshing with the pinions on said axle shaft or stud 9, having bearings in the provided with wrist-pins and mounted upon branches of the fork 3and projecting slightly a counter-shaft in the fork of the frame in from the outer sides of said branches. On

20 which said driving-wheel is mounted,and pitthe ends of the shaft or stud 9, outside the men connecting, respectively, the Wrist-pins fork 3, are secured disks 10 10, having wriston said pinions and gears. pins 11 thereon. To these wrist-pins are piv- My present invention is designed as an imoted the pitmen 12, which extend longitudiprovement upon that disclosed in the applinally and are pivoted upon wrist-pins 13 upon 2 5 cation referred to, the object of the same bethe gears 14:, mounted upon the stud or shaft ing to simplify the construction by dispens- 15 in the rear fork 16. The said gears 14 ing with certain of the parts, and thereby mesh with pinions 17, fast upon the axle making the machine as a whole lighter in of the driving-wheel 18. The wrist-pins 13 weight and less expensiveto manufacture. on the gears 14 have also connected with 0 In carrying out my invention I dispense them the pitmen 19, which extend upwardly with one of the gears on the crank-shaft.and parallel with the rear fork 16 and are respecone of the pinions which cooperates theretively pivoted to the crank-arms 20 21 on with and instead form the lower end of the an auxiliary shaft 22, mounted in the rear seat-post tube of the frame forked or bifurfork 16.

5 cated, extend the crank-shaft through the The pitmen 12, the connections with the branches of the fork or said seat-post tube, rear end thereof, and all the parts connected secure to the crank shaft between the with the driving-wheel18 are substantially branches of the said fork a single gear, and the same as those described in my former ap- Iocate within the fork, above said gear, a pinplication referred to and are for the same pur- 40 ion which is mounted upon a shaft having pose. Myimprovements consistin theforked o disks upon the outer ends thereof which are seat-post tube with the crank-shaft mounted provided with wrist-pins to which the pitmen therein, the single gear secured to said counfor transmitting the motion of the crankter-shaft, and the pinion meshing with said I shaft to the driving-wheel are connected. gear mounted upon ashaft having disks upon 5 The details of myinvention willbeset forth its ends provided withwrist-pins for thelcon- 5 hereinafter, and that which I regard as new nection of'pitmen, which transmit the power will be pointed out in the claim. from the crank-shaft to the driving-Wheel.

In the drawings forming part of this speci- Having now described my invention, what fication, Figure 1 is a side elevation of a Iclaim as new, and desire to secure by Letters 50 bicycle in which my improvements are em- Patent, is

In a bicycle, a seat-post provided with a forked lower end, a crank-shaft journaled therein and provided with suitable pedals, a spur-gear mounted upon said shaft, a shaft 9 jonrnaled in the said fork above said spurgear and extending outwardly on each side thereof, a pinion mounted upon said shaft 9 and meshing with said gear, a disk secured to each extending end of said shaft 9, a driveshaft jcnrnaled in the rear fork of said bicycle and carrying the drive-wheel, a pair of pinions suitably connected to the axle of said drive-wheel, a shaft 15 secured to each of the rear forks of said bicycle, a gear mounted upon each of the shafts 15 and adapted to mesh with the pinions carried by the drivewheel, a wrist-pin secured to each of said gears, a pair of longitndinally-extending pitmen connected at one end to said Wrist-pins and at their opposite end to said disk, an auxiliary shaft mounted in the rear fork of the bicycle, a pair of crank-arms carried by said shaft, and a pair of pitmen arranged within the rear fork and connected at their upper end to said crank-arms and at their lower end to said wrist-pins, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHRISTIAN GANZ.

Witnesses:

GEO. W. REA, F. B. KEEFER. 

